Multiple access point (AP) association

1. An apparatus configured for wireless communication, comprising: one or more memories, individually or in combination, comprising instructions; and one or more processors, individually or in combination, configured to execute the instructions to cause the apparatus to: obtain, from a network node, a first codeword indicating a first beam and a first reflected direction associated with a second beam, the first codeword being one of at least one codeword of a stage-1 codebook; obtain, from the network node, a second codeword of a stage-2 codebook, the stage-2 codebook being associated with the first codeword, the second codeword indicating a parameter of the second beam; update the second beam according to the parameter indicated by the second codeword; obtain, from the network node, a signal via the first beam; and reflect the signal via the second beam and via the first reflected direction.

2. The apparatus of claim 1, wherein the one or more processors are further configured to cause the apparatus to: obtain, from the network node, the stage-1 codebook, the stage-2 codebook, and an additional stage-2 codebook for each codeword of the stage-1 codebook other than the first codeword.

3. The apparatus of claim 1, wherein the first codeword further indicates angular coordinates of a first incident direction associated with the first beam.

4. The apparatus of claim 1, wherein the parameter of the second beam comprises one or more of a sidelobe characteristic of the second beam, a width of the second beam, a gain of the second beam, or a variation of the first reflected direction associated with the second beam.

5. The apparatus of claim 1, wherein the stage-1 codebook comprises a third codeword indicating a second incident direction associated with the first beam and a second reflected direction associated with the second beam, and wherein the one or more processors are further configured to cause the apparatus to: obtain, from the network node, an indication of the third codeword; and update: a first incident direction associated with the first beam to the second incident direction, and the first reflected direction to the second reflected direction.

6. The apparatus of claim 1, wherein the one or more processors are further configured to cause the apparatus to: output, for transmission to the network node, an indication of a capability to update the first beam and the second beam according to the stage-1 codebook and the stage-2 codebook, respectively.

7. A reconfigurable intelligent surface (RIS), comprising: at least one transceiver; one or more memories, individually or in combination, comprising instructions; and one or more processors, individually or in combination, configured to execute the instructions to cause the RIS to: receive, from a network node via the at least one transceiver, a first codeword indicating a first beam and a first reflected direction associated with a second beam, the first codeword being one of at least one codeword of a stage-1 codebook; receive, from the network node via the at least one transceiver, a second codeword of a stage-2 codebook, the stage-2 codebook being associated with the first codeword, the second codeword indicating a parameter of the second beam; update the second beam according to the parameter indicated by the second codeword; receive, from the network node via the at least one transceiver, a signal via the first beam; and reflect, via the at least one transceiver, the signal via the second beam and via the first reflected direction.

8. An apparatus configured for wireless communication, comprising: one or more memories, individually or in combination, comprising instructions; and one or more processors, individually or in combination, configured to execute the instructions to cause the apparatus to: output, for transmission to a device, a first codeword indicating a first beam and a first reflected direction associated with a second beam, the first codeword being one of at least one codeword of a stage-1 codebook; output, for transmission to the device, a second codeword of a stage-2 codebook, the stage-2 codebook being associated with the first codeword, the second codeword indicating a parameter of the second beam; and output a signal for transmission to the device via the first beam, the signal configured to be reflected by the device via the second beam in the first reflected direction.

9. The apparatus of claim 8, wherein the one or more processors are further configured to cause the apparatus to: output, for transmission to the device, the stage-1 codebook, the stage-2 codebook, and an additional stage-2 codebook for each codeword of the stage-1 codebook other than the first codeword.

10. The apparatus of claim 8, wherein the one or more processors are further configured to cause the apparatus to: obtain information indicating a communication constraint associated with the first beam between the apparatus and the device, or associated with the second beam between the device and a user equipment (UE).

11. The apparatus of claim 10, wherein the second codeword is output for transmission in response to the information indicating the communication constraint associated with the second beam between the device and the user equipment (UE).

12. The apparatus of claim 10, wherein the stage-1 codebook comprises a third codeword indicating a second incident direction associated with the first beam and a second reflected direction associated with the second beam, and wherein the one or more processors are further configured to cause the apparatus to: output, for transmission to the device, an indication of the third codeword in response to the information indicating the communication constraint associated with the first beam between the apparatus and the device.

13. The apparatus of claim 10, wherein the one or more processors are further configured to cause the apparatus to: output, for transmission to a network node, a request for the information indicating the communication constraint, wherein the information indicating the communication constraint is obtained from the network node.

14. The apparatus of claim 8, wherein the one or more processors are further configured to cause the apparatus to: output, for transmission to the device, a request for the device to perform a sweep using one or more codewords of the stage-2 codebook; and obtain information indicating one or more of a level of gain experienced by a first user equipment (UE) as a result of the sweep or a level of interference experienced by a second UE as a result of the sweep.

15. The apparatus of claim 14, wherein the second codeword of the stage-2 codebook is output for transmission to the device in response to one or more of the level of gain or the level of interference.

16. The apparatus of claim 8, wherein the first codeword further indicates angular coordinates of a first incident direction associated with the first beam.

17. The apparatus of claim 8, wherein the parameter of the second beam comprises one or more of a sidelobe characteristic of the second beam, a width of the second beam, a gain of the second beam, or a variation of the first reflected direction associated with the second beam.

18. The apparatus of claim 8, further comprising at least one transceiver configured to: transmit the first codeword; transmit the second codeword; and transmit the signal, wherein the apparatus is configured as a network node.